Harness stop-motion for looms.



G. LAVALLEE.

HARNESS STOP MOTION FOR LOOMS. v

APPLICATION FILED IEB.1'7, 1911.

Patented Nov. 26, 1912.

2 SHEETS-SHEET 1.

WITNESSES; W DZ/NVENTOR, ;V7/ZQW M, I

A TTOIRNEX 0. LAVALLEE.

HARNESS STOP MOTION FOR LOOMS. APPLICATION FI-LED PEB.17, 1911.

Patented NOV. 26, 1912.

2 SHEETS-SHEET 2.

I'VITNESSES:

m i INVENTOR,

A TTORNEY.

COLUMBIA PLANOGRAPH CO..WASHINGTDN, D c.

CHARLES LAVALLEE, OF NEW MARKET, NEW EAMPSHIRE.

HARNESS STOP-MOTION FOR LOOMS.

Specification of Letters latent.

Patented Nov. 2%, 1912.

Application filed February 17, 1911. Serial No. 609,243.

To all whom it may concern:

Be it known that 1, CHARLES LAVALLEE, a citizen of the United States of America, and resident of New Market, in the county of Rockingham and State of New Hampshire, have invented certain new and useful Improvements in Harness SilOD-ETOtlOIIS for Looms, of which the following is a full, clear, and exact description.

The object of this invention is to provide a harness stop motion for looms, that is means whereby in case one of the harness straps or other supports break and the harness frame falls or swings downwardly, the loom will be immediately automatically stopped.

In the carrying out of the invention advantage is taken of the conditions and equipments already found upon the loom, that is of the appliances which constitute the weft stop motion so that part of the means which go to make the weft stop motion is utilized as components of the harness stop motion.

The invention is described in conjunction with the accompanying drawings and is set forth in the claim.

In the drawings :Figure 1 is a cross sectional View of so much of a loom as is required to show the provision thereon of my present improvements which are seen in elevation, this view being an exemplification of the loom running under normal conditions and when the stop motion is to remain inactive. Fig. 2 is a view similar to Fig. 1 but illustrating the operative action of the harness stop motion. Fig. 3 is a plan view of a portion of a loom with my improved devices thereon, and Fig. 4 is a perspective View of the same.

The ordinary weft stop motion of a very common well known kind and one which is extensively used at the present time on looms will be first described.

The breast beam 10 carries the weft fork slide 17 on which is pivoted at 23 the weft fork member 20, having the fork 24:, and at the rear an abutment 22, and the grid 25 on the lay 12 cooperates with the fork 24 on beat up of the lay in the usual manner. The harness 13 is held by usual straps 14:. Upon failure of weft the grid 25 will not swing the fork member 20 and the weft hammer 27 will strike the abutment 22 and shift the slide 17, to move the shipper 1S and stop the loom in the usual manner.

The foregoing description in conjunction with which numerals of reference have been used, applies to an ordinary and well known weft stop motion for looms; and I will now proceed to describe in detail. the parts which in conjunction with some of the parts of the weft stop motion make the harness stop motion of a practical and entirely operative kind.

a represents a rod arranged under and transversely relatively to the harness frame, the same being pivotally supported at its rear end upon a horizontal bar 6 therefor, as shown.

(Z represents a rocking rod or shaft supported for its oscillation on the rear of the breast beam, the same having a crank like portion (Z and having an arm 7 which extends upwardly into proximity with the side of the slide 17.

9 represents a locking device pivotally mounted for swinging movement in the vertical plane on the side of the slide, the same having amember extending forwardly and also transversely so as to assume a position for locking engagement on the aforementioned abutment and comb finger provided member 20 carried by the slide as aforesaid. The portion of this locking device which depends below the pivot is made with a horizontally looped rigid extension with which the upwardly extending arm 7' of the crank rockshaft engages.

The normal positions of the parts of the harness stop motion are represented in Fig. 1, wherein it is seen that the rear extremity of the locking device 9 is maintained elevated, and so as not to constitute any impediment to the freest possible rising and returning movement of the weft fork device 20, 22, 24; but referring to Fig. 2, wherein it is seen that a broken harness strap has re sulted in the forming of one of the harness frames, which by its weight' quite forcibly depresses the rod (4, the downmoving forward end of the rod through its connection it with the cranked portion (Z of the rockshaft has so rocked the shaft that its then forwardly moving arm f has correspondingly moved the lower portion (Z of the locking device so that the rear portion 9 of such locking device is in firm bearing and motion preventing engagement against the slide carried pivoted device; and now the weft hammer 27 will move the slide forwardly, by engagement with the abutment 22 in precisely the same manner as would be the case on a weft failure to throw the loom driving mechanism out of clutch or driving connection.

It is to be perceived and hardly requires mention that some of the devices are provided in duplicate as a measure of manifest desirability. Y

I claim In a loom, the combination with the harness, weft hammer, beam, lay and grid, weft slide and shipper, and a weft fork member arranged to operate the weft slide from the weft hammer movement, of a bent lever pivoted to the weft fork slide and having an arm normally in proximity to the weft fork member and an arm depending into the region of the breast beam, a shaft pivoted on the breast beam, an arm on said shaft ensaid latter levers and the said depending arms on the shaft whereby the falling of a harness will swing the levers and rock the shaft and cause the bent lever to swing and move the tail of the weft fork into the path of the hammer and effect the stoppage of the loom.

Signed by me at New Market, N. H., in presence of two subscribing witnesses.

CHARLES LAVALLEE. Vitnesses:

ERNEST BOISVERT, FEED. MARCOTTE.

Copies 0L this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

